Investigation of the Impact of Anti-Negative Pressure Facility on a Water Distribution System

Abstract:

High level water tank is a commonly used facility to satisfy water demand for people living in high building, which is also the so-called secondary water supply system (SWSS) in China. Due to lack of maintenance, water quality problem has been frequently reported in the SWSS. In the last few decades, anti-negative pressure facility (ANPF) has emerged as a revolutionary approach for solving the pollution in the SWSS. ANPF makes good use of the municipal pipeline pressure, which is the improvement of traditional water supply. However, most of recent research activities mainly focus on the influence of part of water distribution system (WDS). In this paper, the software of EPANET has been applied in the SWSS calculation and simulation. Besides that, the SWSS with ANPF simulation method is proposed to evaluate the effect of other all nodes pressure in the WDS using hydraulic model. As the cases study, the paper analyzed two WDSs with ANPF. After simulation of the SWSS, the result of WDS, which is smaller, indicates that 6 out of the 9 nodes are affected with ANPF and that of WDS, which is larger, demonstrates that 37 out of the 41 nodes are affected and the affected nodes are focused on the confluent of pipes, especially around the ANPF.

• Periodical: Applied Mechanics and Materials (Volumes 316-317)
• Pages: 719-722
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.316-317.719
• Online since: April 2013
• Authors: Huan Huan Wang, Shu Ming Liu, Fan Lin Meng, Lu Bai
• Keywords: Anti-Negative Pressure Facility, Node’s Pressure, Secondary Water Supply System

References

[1] Li S.Y. ,"Comparison between Direct Network Pressure-Super positional Method of Water Supply and Traditional Method of Water Supply". Journal of Hunan Agricultural University (Natural Sciences), 28,5, (2002) 441-443.

[2] Ma S.H." the qualification of non-negative pressure facility for water distribution network", water & wastewater engineering, 31, 7,(2005) 81-84.

[3] Liu Z. "Application of Direct Network Pressure-super positional Method of Water Supply", water & wastewater engineering, 33,6(2007) 87-90.

[4] Pretner, A. Optimizing and controlling water supply system: Athens Pilot Project[C]. Proceedings of the European Water Resources Association Conference, 9(1997): 439-444.

[5] Fan J., Wei X., Wang F.," Problem s in Network Pressure-superposed Water Supply and Corresponding Solution, China Water &Wastewater, ,22,22,(2006) 39-42.

[6] Tian Y.M., Si Y.J, Li H, Evaluation and Optimization of Secondary Water Supply System Renovation[J].Journal of Zhejiang University SCIENCEA,8,9,(2007) 1488-1494

DOI: 10.1631/jzus.2007.a1488

[7] Wang F.Q., Song S.L., Li L. Wu Q.L. "Water supply shortages prediction of no-negative pressure system based on network hydraulic calculation", Water Saving Irrigation,11,(2010) 37-45

[8] Rossman L A. EPANET 2 User's Manual Cincinnati, OH: National Risk Management Research Laboratory Office of Research and Development U.S. Environmental Protection Agency, (2000).